Intel Desktop Board DH55HC Technical Product Specification 
22   
1.11.2.1  Analog Audio Connectivity 
The available configurable back panel audio connectors are shown in Figure 4. 
 
Item Description 
A  Audio line in 
B  Audio line out 
C Mic in 
Figure 4.  Back Panel Audio Connector Options 
The back panel audio connectors are configurable through the audio device drivers. 
 
For information about   Refer to 
The back panel audio connectors  Section 2.2.1, page 38 
 
The front panel headphone output is supported via a separate audio channel pair 
allowing multi-streaming audio configurations such as simultaneous 5.1 surround 
playback and stereo audio conferencing (through back panel speakers and front panel 
headset, respectively). 
1.11.2.2  SPDIF Connectivity 
The SPDIF header allows connectivity to coaxial or optical dongles for digital audio 
output. 
1.11.2.3  Internal Mono Speaker Connectivity 
The internal mono speaker header allows connectivity to an internal, low-power 
speaker for basic system sound capability.  The subsystem is capable of driving a 
target speaker load of 8 Ohms at 1 W (rms) or 4 Ohms at 1.5 W (rms).